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020 4621 3520 Negative Who called me from this phone number?

London • Colt Technology Services
This number is a landline operated by Colt Technology Services and located in London, England. The overall user rating for this number is Negative. The number 02046213520 has been searched 128 times, with 3 user comments helping to identify the caller's intent.
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At a glance

Community signals

  • User reports: 3 user reports
  • Searches: 128
  • Last reported: about 2 months ago
  • First reported: 4 months ago
  • Typical call time: before 2pm (92% of calls)

Number profile

  • UK format: 020 4621 3520
  • International: +442046213520
  • Number type: Landline
  • Carrier: Colt Technology Services
  • Area: London
  • Area code: 020

User Reports (3)

Your reports help others decide whether to answer calls from this number. Share your experience to help the community!

Scam/Fraud
2 months ago

I had a couple of calls within a few minutes from this person, again it was about sim card cancellation and insistence that a new one was to be sent next day. She wanted to know who pays the bills and told me to look at a texted security warning I should have received from O2. Which I had, of course. The first couple of times this registered as a private number and the third time the number was marked as suspected spam. I might have thought they were different callers except that the sim card issue was mentioned here.

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Scam/Fraud
2 months ago

Said from O2, needed to send a new SIM and I had to confirm address, when I said O2 obviously have my address got extremely aggressive when I refused to give address when she didn't know my current or even my name...

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Spam
4 months ago

Says phoning from O2. Threatening to cut off sim card. Trying to get owner to give them the passnumber from O2. Presumably to change the account to their control. Same as past scams received.

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What type of call was it?

Reported locations

Reported from 21 UK cities

Manchester (Hulme), Beighton, Sunderland, Brighton, Cowplain, London, Great Malvern, Poplar, Bracknell, London (City of Westminster), Easton-in-Gordano, Birmingham, Peterborough, Litherland, Portslade, Huyton, Morden, Skellingthorpe, Bradford, Bristol, Keele

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How to Block This Number

On iPhone

  1. Open the Phone app and go to Recents
  2. Find the number 020 4621 3520 and tap the info icon (i)
  3. Scroll down and tap Block this Caller
  4. Confirm by tapping Block Contact

On Android

  1. Open the Phone app and tap the 3-dot menu
  2. Go to Call history or Recents
  3. Long press on 020 4621 3520
  4. Select Block number or Block/report spam

On Landline Phones

Several options are available for UK landlines:

  • BT Call Protect - free for BT customers
  • TalkTalk CallSafe - free for TalkTalk customers
  • Call blocking devices like CPR Call Blocker (available on Amazon)

Register with TPS (Telephone Preference Service)

The TPS is a free service for UK consumers that allows you to opt out of unsolicited sales and marketing calls.

Learn more about TPS registration

Latest reports

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Call Costs

Calling 02046213520 from a landline may cost up to 16p per minute. Many providers charge a 23p call set-up fee. Call packages often include these types of calls. You might not incur additional charges for calling this number, depending on your provider.

Dialling Instructions

Local UK callers can dial 02046213520 directly.

International callers should dial +44 20 4621 3520 or 0044 20 4621 3520. No leading zero is required when dialling abroad, e.g., +44(0)2046213520.

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